Mike,
Just to show how stubborn I am! If I were in your place, I'd consider a fully balanced 2 channel pre-amp like an Adcom GFP750. It has a throughput to incorporate into a video processor when in multi-channel mode. If you only need 2 channels of balanced, you won't be buying the other 3, you can use a non-balanced processor for them.
I think the big-name processors are:
1. Overpriced.
2. A BIG rip-off when it comes to the promised
upgrades.
I've seen friends buy early generation Proceed & Lexicon processors. They were completely superseded by another model. They're like 2 year old computers.... You just about have to give them away..